Diodes ZHT431 - Manual (Page 2)

ZHT431
ZHT431
Document number: DS32157 Rev. 11 - 2
2 of 8
www.diodes.com
November 2010
© Diodes Incorporated
A Product Line of
Diodes Incorporated
Absolute Maximum Ratings
(Voltages to GND Unless Otherwise Stated)
Parameter Rating Unit
Cathode Voltage (V
Z
) 20 V
Cathode Current 150 mA
Operating Temperature -55 to 125 °C
Storage Temperature -55 to 150 °C
Power Dissipation
(T
amb
= 25°C, T
JMAX
= 150°C)
330 mW
Recommended Operating Conditions
Parameter Min Max Units
Cathode Voltage V
REF
- 20 V
Cathode Current 0.05 100 mA
Electrical Characteristics
(Test conditions unless otherwise specified: T
amb
= 25°C)
Symbol Parameter
Values
Units Conditions
Min. Typ. Max.
V
REF
Reference Voltage 2%
1%
0.5% 2.45
2.475
2.4875
2.50
2.50
2.50 2.55
2.525
2.5125
V
I
L
=10mA (Fig.1),
V
Z
=V
REF
V
DEV
Deviation of reference input voltage
over temperature
10 30 mV
I
L
=10mA, V
Z
=V
REF
T
amb
=full range (Fig1)
ΔV
REF
ΔV
Z
Ratio of the change in reference voltage
to the change in cathode voltage
-1.85 -2.7 mV/V
V
Z
from V
REF
to 10V
I
Z
=10mA (Fig.2)
-1.0 -2. mV/V
V
Z
from 10V to 20V
I
Z
=10mA (Fig.2)
I
REF
Reference input current 0.12 1.0 µA
R1=10k, R2=O/C,
l
L
=10mA (Fig.2)
ΔI
REF
Deviation of reference input current
over temperature
0.04 0.2 µA
R1=10k, R2=O/C,
I
L
=10mA T
amb
=full range
(Fig.2)
I
Zmin
Minimum cathode current for regulation 35 50 µA V
Z
=V
REF
(Fig.1)
I
Zoff
Off-state current 0.1 µA V
Z
=20V, V
REF
=0V(Fig.3)
R
Z
Dynamic output impedance
0.75 V
V
Z
=V
REF
(Fig.1), f=0Hz,
I
C
=1mA to 100mA
Deviation of reference input voltage, V
DEV
, is defined as the maximum variation of the reference input voltage over the full
temperature range.
The average temperature coefficient of the reference input voltage, V
REF
is defined as:
The dynamic output impedance, R
Z
, is defined as:
When the device is programmed with two external resistors, R1 and R2,
(fig 2) , the dynamic output impedance of the overall circuit, R’, is defined as: